The developers suggest to change the values to 512 (VeraCryptEncryptionFragmentSize), 128 (VeraCryptEncryptionIoRequestCount) and 64 (VeraCryptEncryptionItemCount) respectively, as it enhances "sequential read speed on some SSD NVMe systems". Its default value and maximum value is half the value of VeraCryptEncryptionIoRequestCount. The DWORD VeraCryptEncryptionItemCount defines the maximum number of encryption queue items processed in parallel. The default is 16, it can be increased up to a value of 8192. The DWORD VeraCryptEncryptionIoRequestCount defines the maximum number of parallel I/O requests. The default value is 256, it can be increased up to a value of 2048. The DWORD VeraCryptEncryptionFragmentSize defines the size of encryption date fragment in KiB. Create the DWORDs with a right-click on veracrypt and the selection of New > Dword (32-bit) Value) from the context menu.Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\veracrypt.Open the Registry Editor by selecting Start, typing regedit.exe and loading the result.Here is what the three Registry values do and how you set them:
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